How to delete data in ArrayList using a for loop

Question

I'm deleting my ArrayList data using for loop but the loop only deletes the last index of my list. What's wrong with this? I think this would be easy but I'm taking an hour an still cannot solve this.

 for (int i = 0; i < selectedRowFile.size() - 1; i++) {
     imagesFileName.remove(i);
         mylist.remove(i);
     adapter.notifyDataSetChanged();
     Toast.makeText(getApplicationContext(),"" + selectedRowFile.size() , Toast.LENGTH_LONG).show();
}

Can you give me an example i don't know what iterator is. Although I'm new to java — NewDroidDev, Jul 04 '13 at 12:06

score 4 · Answer 1 · edited May 23 '17 at 10:25

4

You should remove an element from a List using an Iterator.

        Iterator<YourDataType> it = YourList.iterator();
        while (it.hasNext()) 
               it.remove();

With this you can use if-else to specify the element, which should be removed.

This should give you some hints, why you should use an Iterator.

edited May 23 '17 at 10:25

Community

1
1

answered Jul 04 '13 at 12:06

Steve Benett

12,843
7
59
79

score 2 · Answer 2 · answered Jul 04 '13 at 12:05

2

I don't know why you're using a for loop, but you can also clear an ArrayList object by using clear.

List myList = new ArrayList<Object>();
myList.clear();

Using a for loop to clear an ArrayList seems dubious to me.

answered Jul 04 '13 at 12:05

JREN

3,572
3
27
45

I want to use for loop because im not going to delete all the data in my array list – NewDroidDev Jul 04 '13 at 12:11
Then your best chances are to follow the answer that Steve Benett gave you – JREN Jul 04 '13 at 12:12

How to delete data in ArrayList using a for loop

2 Answers2